It is easy to feel overwhelmed by stress and anxiety during challenging and uncertain times. Positive thinking can help you to handle problems more effectively and provide a boost to your immune system and self-esteem. Step 1: Write down the things you are worried and stressed about to get them out of your head. Step 2: Make a list of things you feel positive or grateful for. Step 3: When you find yourself in a negative thought, remind yourself of the things you are grateful for. This will help to train your brain to focus on the positive.